This product contains ingredients which may cause skin irritation on certain individuals and a preliminary test according to accompanying directions should first be made. This product must not be used for dyeing the eyelashes or eyebrows - to do so may cause blindness. Do not use if you have skin depigmentation problems such as white patches on your skin (a condition called vitiligo), or if you have a family history of skin depigmentation problems, as an allergic reaction of skin irritation may cause loss of skin pigment.